Regular maintenance is important! The Deluxe Sword Maintanance kit gets you started with the right equipment? and comes ready to use, in an all paulownia wood maintenance box. The deluxe sword maintenance kit includes oil gauze, nugui-gami paper, choji oil, a brass mekugi hammer and an uchiko powder sack. Using the oil gauze, lightly apply the choji oil to your blade. Once evenly spread; wipe the entire blade clean with the nugumi-gami paper. Whenever handling the blade, always be sure to use the nugumigami paper.